A guy, Michael V. Franklin, discussed this kind of D programming
a bit at DConf 2014.
https://www.youtube.com/watch?v=o5m0m_ZG9e8
If you're getting into this kind of thing, it's a must see. With
some Googling, I found his minimal D runtime, too.
https://github.com/JinShil/druntime_level_0
I might take his work and Adam's work and make something myself.
I'm currently in the middle of trying to get a D program to run
on a Pebble watch, and I know this kind of runtime replacement
stuff is coming.
One thing I would like to see is a minimal runtime with version
blocks. So you can introduce only parts of the runtime that you
want, make parts of the runtime do different things, or turn
parts of the runtime off so you can provide your own
implementation specific to the machine you're working with.
